Sweet and Tangy Fruit Salad

To make pickled onions, combine the red onion and the red wine vinegar in a small bowl. Cover; chill for at least one hour.

Pour the orange juice into a large salad bowl. Whisk in the olive oil and orange zest; season with 1/4 teaspoon salt and black pepper. Toss the cantaloupe, watermelon and mango in the dressing. Just before serving, stir in the pickled onions and coriander leaves.

Cut the avocados into 1.25cm cubes; place in a small bowl. Sprinkle with the lime juice and season with the remaining 1/4 teaspoon salt. Stir lightly to combine. Spoon an even amount of avocado into the bottom of 6 large martini or wine glasses. Top avocado with melon salad; garnish each salad with a lime slice.